听力原文: What do we mean by a satisfactory standard of living? Obviously, it must include the basic necessities of life such as food, clothing and shelter. To obtain these necessities on a regular basis, a person must have a reliable income. But we have other needs which we would probably also describe as basic, for example, health and education facilities and security.
All of these we may define as our needs. But most of us would be far from satisfied if we had nothing more than these provided for us. We all enjoy having extra income to spend on things such as books, sports, or hobbies. Sometimes we save some of this extra income to provide for future expenditure of this type on holidays, for example. So in addition to our basic needs, we must add our wants. Our standard of living is the degree to which these needs and wants are satisfied.
Why are we far from satisfied with our basic needs?
A.Because we should save extra money for future expenditure.
B.Because we have other wants in addition to our basic needs.
C.Because we all enjoy reading books.
D.Because man is never satisfied even if he has everything he wants.
第1题
关于心脏射血分数,下列叙述错误的是()。
A.正常成人射血分数是60%~70%
B.射血分数为每搏量除以左室舒张末容量
C.扩张性心肌病患者射血分数降低
D.如果射血分数低于40%表明心肌收缩性严重不良
E.射血分数为每搏量除以左室等容收缩期容量
第3题
关于射血分数(EF),下列叙述错误的是()。
A.射血分数是心室舒张末期容量(EDV)和收缩末期容量(ESV)之差与ESV的比值
B.射血分数是心室舒张末期容量(EDV)和收缩末期容量(ESV)之差与EDV的比值
C.射血分数可以结合其他心功能指标,精确地进行心功能分级
D.成人正常的左心室射血分数(LVEF)为(60.0±7.0)%,右心室射血分数(RVEF)为(48.0±6.0)%
E.静态LVEF<50%,RVEF<40%即为心室功能降低
第5题
有关左心室射血分数(EF)的描述,错误的是
A、射血分数用来反映左心室的泵血功能
B、EF=SV/EDV
C、EF静息状态下不小于50%
D、EF=SV/CO
E、左室射血分数可受心脏后负荷的影响,但它仍是反映左心室收缩功能的可靠指标
第6题
有关左心室射血分数(EF)的描述,错误的是
A、射血分数用来反映左心室的泵血功能
B、EF=SV/EDV
C、EF静息状态下不小于50%
D、EF=SV/CO
E、左室射血分数受心脏后负荷的影响,但它是反映左心室收缩功能的可靠指标
第7题
二维彩超测定的射血分数(EF)大于实际射血分数的心脏瓣膜病变是
A、主动脉关闭不全
B、二尖瓣关闭不全
C、二尖瓣狭窄
D、肺动脉瓣狭窄
E、主动脉瓣狭窄
第8题
有关左心室射血分数(EF)的描述,错误的是
A.射血分数用来反映左心室的泵血功能
B.EF=SV/EDV
C.EF静息状态下不小于50%
D.EF=SV/C0
E.左室射血分数受心脏后负荷的影响,但它是反映左心室收缩功能的可靠指标
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